"Many of our fans like the opposing players and teams and that's great," Nets chief executive Brett Yormark told CNBC.com. "When you come to our games, the concessionaire is selling the opposing team's jerseys, so why not give them away?"

Changes coming

Forget film study, playbooks and the NFL Network. Football's biggest sign of evolution is the drastic changes between Nintendo's Tecmo Super Bowl, released in 1991, and the soon-to-be-released Madden NFL 10.

Sports Illustrated's "Tale of the Tape" shows the wide disparity between a game that values simplicity and a game whose players' ratings are scrutinized each season by players and fans.